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Upon opening Firefox, I get this error message: Error: TypeError: xulItems[item].getAttribute is not a function

vek30
vek30
Posted

What is causing this? And how can I fix it?

Chosen solution

by cor-el

Start Firefox in Troubleshoot Firefox issues using Safe Mode to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).

Read this answer in context 2

Helpful replies

Is it happening only with Firefox and with no other browser ? Did you recently upgrade it or reinstalled it ? This is a specific error that should ideally be not coming if things are proper

It appears that Firefox is not properly installed (when you run it, it goes to a point and after that due to some issue it throws that error message. Also see Note below). May be you can download again and reinstall it ...

Note: XUL (XML User-interface Language) is a cross platform language for describing user interfaces of applications. XUL (pronounced zool) was created to make development of the Mozilla browser easier and faster.

Go to answer 1

After I started in safe mode and reset the toolbars, it got fixed! I am not getting the error message anymore. Thanks much.

Go to answer 2

Additional System Details

This happened

Every time Firefox opened

This started when...

a week or so ago

Installed Plug-ins

  • Adobe PDF Plug-In For Firefox and Netscape 10.1.2
  • Shockwave Flash 11.1 r102
  • Version 2.6.1.5251
  • Google Talk Plugin Video Accelerator version:0.1.44.14
  • iTunes Detector Plug-in
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • Google Update
  • GEPlugin
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Next Generation Java Plug-in 1.6.0_29 for Mozilla browsers
  • RealJukebox Netscape Plugin
  • RealNetworks(tm) RealPlayer Chrome Background Extension Plug-In
  • RealPlayer(tm) HTML5VideoShim Plug-In
  • RealPlayer(tm) LiveConnect-Enabled Plug-In
  • 12.0.1.666
  • 4.0.60831.0
  • NPWLPG
  • The Hulu Desktop Plugin allows Hulu.com to integrate with the Hulu Desktop application.
  • Office Live Update v1.5
  • Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
  • Office Plugin for Netscape Navigator

Application

  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:9.0.1) Gecko/20100101 Firefox/9.0.1

More Information

Close
Prabhuti
Prabhuti 6 solutions 38 answers
Posted

Helpful Reply

Is it happening only with Firefox and with no other browser ? Did you recently upgrade it or reinstalled it ? This is a specific error that should ideally be not coming if things are proper

It appears that Firefox is not properly installed (when you run it, it goes to a point and after that due to some issue it throws that error message. Also see Note below). May be you can download again and reinstall it ...

Note: XUL (XML User-interface Language) is a cross platform language for describing user interfaces of applications. XUL (pronounced zool) was created to make development of the Mozilla browser easier and faster.

vek30
vek30
Posted

Question owner

Yes, it only happens with Firefox...recently installed/upgraded to firefox 9.01. I will download again and reinstall. thanks.

Prabhuti
Prabhuti 6 solutions 38 answers
Posted

Any luck with the new installation ?

vek30
vek30
Posted

Question owner

No...I am getting the same error message. Help!

cor-el
cor-el
  • Top 10 Contributor
  • Moderator
8288 solutions 78436 answers
Posted

Chosen Solution

Start Firefox in Troubleshoot Firefox issues using Safe Mode to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).

vek30
vek30
Posted

Helpful Reply

After I started in safe mode and reset the toolbars, it got fixed! I am not getting the error message anymore. Thanks much.

godis1224
godis1224 0 solutions 1 answers
Posted

I have re-installed Firefox so many times because of different issues it's not even funny. This Type Error message doesn't go away. Also, sometimes my Google Calendar doesn't work, and sometimes it does. What's up with that? I have Windows Vista, and I'm wondering if that's part of the problem? Please advise because Google nor Firefox has any customer service numbers to be able to reach them. Thanks! Have a nice week, ya'all! Later, godis1224

cor-el
cor-el
  • Top 10 Contributor
  • Moderator
8288 solutions 78436 answers
Posted

Did you try to disable all extensions to see if that helps?